Playing around with RTLSDR - Versionsgeschichte

Dl8rds: /* Multichannel Reception */

2015-09-18T19:06:00Z

‎Multichannel Reception

Dl8rds: /* Multichannel Reception */

2015-09-18T16:26:00Z

‎Multichannel Reception

Dl8rds am 18. September 2015 um 16:16 Uhr

2015-09-18T16:16:15Z

Dl8rds am 18. September 2015 um 16:09 Uhr

2015-09-18T16:09:50Z

Dl8rds am 18. September 2015 um 16:07 Uhr

2015-09-18T16:07:30Z

Dl8rds am 18. September 2015 um 16:06 Uhr

2015-09-18T16:06:58Z

Dl8rds: Die Seite wurde neu angelegt: „== Introduction & Motivation == Long time has passed by with lots of things and new developments. I have seen now that modern digital radar cards sample the r…“

2015-09-18T16:06:12Z

Die Seite wurde neu angelegt: „== Introduction & Motivation == Long time has passed by with lots of things and new developments. I have seen now that modern digital radar cards sample the r…“

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== Introduction & Motivation ==

Long time has passed by with lots of things and new developments. I have seen now that modern digital radar cards sample the radar signal with ~~ 100 MSPS and can produce a good radar resolution of 7m per pixel.
Since I'm working in the radar technology field now (expecially configuring and tweaking Terma Scanter 2001 radars, I have been wondering what I can do with SDR and radar. First of all I thought maybe I can get some precision out of an RTL SDR stick. For my first attempts, sampling a signal at those 3 MSPS should bee good enough before shifting over to my USRP2.

Let me note that my USRP2 was a fantastic device in 2010 and it still is. But it is noteworthy that the RedPitaya costs 230 Euro today and samples at 125 MSPS.

== First attempts on the RTLSDR stick ==

I have purchased this device: (lsusb output)

Realtek Semiconductor Corp. RTL2832U DVB-T

I have blacklisted the native driver in /etc/modprobe.d/blacklist.conf

blacklist dvb_usb_rtl28xxu

and I have played around with Alex Csete's GQRX tool. Really great, I can receive BC FM stations, notably the classical music station at 103.2 MHz.

After this attempt, I started to go a little urther and play around with GNURadio again. I noticed that so many things have changed since I last tried out gnuradio-companion. Many more blocks, much more functionality, everything has changed. Anyway, here is my first sketch. I copied from here: http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/

[[2015-09-18-gnuradio_rtlsdr1.png|400px]]

@@ Zeile 37: / Zeile 37: @@
   [Discuss-gnuradio] GRC Polyphase Channelizer examples?
   http://lists.gnu.org/archive/html/discuss-gnuradio/2011-10/msg00120.html
 == Multichannel Transmission ==

@@ Zeile 32: / Zeile 32: @@
   Discuss-gnuradio] isolate channels from wideband
   http://lists.gnu.org/archive/html/discuss-gnuradio/2015-07/msg00380.html
 == Multichannel Transmission ==

← Nächstältere Version		Version vom 18. September 2015, 16:16 Uhr
Zeile 29:		Zeile 29:

	A lot of responses have come on a thread I triggered on the gnuradio discussion list on how to receive multiple channels in parallel.		A lot of responses have come on a thread I triggered on the gnuradio discussion list on how to receive multiple channels in parallel.
		+
		+	Discuss-gnuradio] isolate channels from wideband
		+	http://lists.gnu.org/archive/html/discuss-gnuradio/2015-07/msg00380.html
		+
		+	== Multichannel Transmission ==
		+
		+	Here are some notes. This solution does not work with the RTLSDR stick, but it works with the USRP2...:
		+
		+	http://wiki.opendigitalradio.org/Multiple_stations_FM_transmitter_using_gnuradio

← Nächstältere Version		Version vom 18. September 2015, 16:09 Uhr
Zeile 21:		Zeile 21:

	[[image:2015-09-18-gnuradio_rtlsdr1.png\|400px]]		[[image:2015-09-18-gnuradio_rtlsdr1.png\|400px]]
		+
		+	Links:
		+	* http://blog.chris007.de/?p=391
		+	* http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/
		+
		+	== Multichannel Reception ==
		+
		+	A lot of responses have come on a thread I triggered on the gnuradio discussion list on how to receive multiple channels in parallel.

← Nächstältere Version		Version vom 18. September 2015, 16:06 Uhr
Zeile 20:		Zeile 20:
	After this attempt, I started to go a little urther and play around with GNURadio again. I noticed that so many things have changed since I last tried out gnuradio-companion. Many more blocks, much more functionality, everything has changed. Anyway, here is my first sketch. I copied from here: http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/		After this attempt, I started to go a little urther and play around with GNURadio again. I noticed that so many things have changed since I last tried out gnuradio-companion. Many more blocks, much more functionality, everything has changed. Anyway, here is my first sketch. I copied from here: http://www.instructables.com/id/RTL-SDR-FM-radio-receiver-with-GNU-Radio-Companion/

−	[[2015-09-18-gnuradio_rtlsdr1.png\|400px]]	+	[[image:2015-09-18-gnuradio_rtlsdr1.png\|400px]]

@@ Zeile 4: / Zeile 4: @@
 Since I'm working in the radar technology field now (expecially configuring and tweaking Terma Scanter 2001 radars, I have been wondering what I can do with SDR and radar. First of all I thought maybe I can get some precision out of an RTL SDR stick. For my first attempts, sampling a signal at those 3 MSPS should bee good enough before shifting over to my USRP2.
-Let me note that my USRP2 was a fantastic device in 2010 and it still is. But it is noteworthy that the RedPitaya costs 230 Euro today and samples at 125 MSPS.
+Let me note that my [[USRP2]] was a fantastic device in 2010 and it still is. But it is noteworthy that the RedPitaya costs 230 Euro today and samples at 125 MSPS.
 == First attempts on the RTLSDR stick ==